ISSN:
1573-5036
Keywords:
Bacteria
;
Direct observation
;
Salinity
;
Salt stress
;
Soil
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary The effects of balanced and unbalanced high-salt nutrient solutions on soil microorganisms were studied with the aid of fluorescence microscopy. Changes in microbial activity were determined by evaluation of direct counts, degree of colonization, colonization patterns, and distribution of bacteria throughout the soil samples. Although both types of salt solutions inhibited growth at high levels of osmotic stress (−1000, −1500, and −2000 kPa), the balanced salt formulation stimulated growth at less negative osmotic potentials (−500 kPa). However, the patterns of colonization and distribution of bacteria in the soil were altered. Following the removal of salt stress by leaching, recovery of microbial activity was rapid. It appeared that the microbial populations in the stress-relieved soils were different from those present before stress was applied. The advantages of using several parameters to evaluate the effects of stress on the microbial population in soil are reflected in the present work.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02184200
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